final_04

final_04 - Bio 120 FINAL 8-11 AM 9 June 2004

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Unformatted text preview: Bio 120 FINAL 8-11 AM 9 June 2004 Name:_____________________________________ 1 INSTRUCTIONS WRITE YOUR NAME ON EVERY PAGE. Do it now . THE AMOUNT OF SPACE PROVIDED IS YOUR GUIDE AS TO HOW MUCH TO WRITE. PLEASE DONT WRITE ON THE BACKS OF PAGES. READ THE QUESTIONS CAREFULLY. THERE IS NO PARTIAL CREDIT FOR ANSWERING THE WRONG QUESTION! ANSWER QUESTIONS 1-4 Question 1: ___ out of 50 points Question 2: ___ out of 50 points Question 3: ___ out of 100 points Question 4: ___ out of 100 points THEN ANSWER ONE OF THE FOLLOWING: Question 5: ___ out of 100 points Question 6: ___ out of 100 points TOTAL ___ out of 400 points Bio 120 FINAL 8-11 AM 9 June 2004 Name:_____________________________________ 2 Q UESTION 1 (50 POINTS ) Define the following terms, as used in developmental biology, using diagrams as necessary; if the term applies to a particular species or class of animals, state which. ( 5 points each.) Acrosome Progress Zone Myoplasm Homeodomain protein Mid-blastula transition Bio 120 FINAL 8-11 AM 9 June 2004 Name:_____________________________________ 3 Q UESTION 1, CONTINUED Optic cup Vitelline envelope Parasegment SRY gene Epiboly Bio 120 FINAL 8-11 AM 9 June 2004 Name:_____________________________________ 4 Q UESTION 2 (50 POINTS ) In each group of statements, either three are false and one is true, or one is false and three are true. Indicate which is the odd man out and whether it is true or false. Five points each. (a) Cytoplasmic determinants Germ plasm contains RNA and proteins The germ line is specified by cytoplasmic determinants in some species The yellow crescent cytoplasm specifies neural fate in ascidians P granules are associated with the germline in C elegans (b) Organogenesis Drosophila tracheal development involves tube formation and branching High oxygen levels promote formation of tracheal terminal branches In kidney development the metanephric mesenchyme signals to the ureteric bud In kidney development the ureteric bud signals to the metanephric mesenchyme (c) Fly embryogenesis Drosophila imaginal discs give rise to larval structures and later degenerate Hunchback activates the transcription of bicoid HOM-C genes were discovered by analyzing homeotic mutations Mutations in segment polarity genes affect alternating segments (d) Gametogenesis and fertilization Sperm-egg recognition involves extracellular matrix proteins ZP3 is an integral membrane protein expressed on sperm Human spermatids are functionally diploid Egg activation involves a rise in intracellular calcium concentration. (e) Anterior-posterior axis Vertebrate mesoderm is segmented along the a-p axis Vertebrate Hox genes show sequence similarities to Drosophila HOM-C genes The mouse has four Hox clusters The advantage of Xenopus as a model system is that it is an invertebrate Bio 120 FINAL 8-11 AM 9 June 2004 Name:_____________________________________ 5 Q UESTION 2 CONTINUED (f) Vertebrate limb Vertebrate limb identity is conferred by the ectoderm The first structures to be specified in limb development are the digits...
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This note was uploaded on 08/26/2008 for the course BIO 120 taught by Professor Idk during the Winter '04 term at UCSC.

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final_04 - Bio 120 FINAL 8-11 AM 9 June 2004

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